Abstract
The results of studies of the three-factor experiment, which allows determining the effects of the microbiological fertilizer Extrasol (factor C) and plant stand (factor B) on the yield of corn hybrids (factor A), are presented. It was established that in 2014, an early ripening hybrid Ross 197 MW had a higher average yield - 5.46 t/ha. In 2015 and 2016, middle-early ripening hybrid Ross 299 MW was more productive – 6.85 and 5.97 t/ha respectively. During the experiment, middle-late hybrid STK 175MV did not realize the potential yield due to lack of moisture during the growing season. Hybrids have a tendency to increase grain yield with an increase in the number of plants per unit area. The grain yield by factor B in 2014 was 3.23–7.25 t/ha; in 2015 – 3,80–8,41 t/ha; in 2016 - 3.91–6.19 t/ha. The variability of the sign “grain yield” in 2014 and 2015 was influenced by factor B (plant stand) - 79.0 and 82.30%, respectively. In 2016, the influence of factor B was slightly lower - 47.0%, but at the same time the influence of factor A (hybrid) increased - 33.6%.
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